1. SIPROTEC 4 Distance Protection 7SA522 and 7SA6
Productmanager Distance Protection
Michael Claus
EV S V 13 Nürnberg H
Phone:
Fax:

2. SIPROTEC 4 - What it means
is a family of numerical
Protection, Control and Automation Devices
from

3. Distance protection: Past and Present
Experience
7SA510
7SA511
7SA513
SIPROTEC 4
Software System
System
7SA522
7SA6
Oben links: Stückzahlen
7SA510:2500
7SA511:20000
7SA513:2000
Unten: Liefereinsatz Sommer 2000
Requirements
SIPROTEC 4 Hardware Platform
Variability

4. SIPROTEC 4 Distance Protection 7SA522 and 7SA6
7SA SA6
One family of distance protection for all voltage applications

5. SIPROTEC 4 Distance protection
7SA610
7SA SA522
7SA SA522
7SA61 + 7SA522  Protection  4-line display  MV, HV and EHV
7SA631
7SA632
7SA63  Protection + local control  integrated graphic display  mainly MV
7SA641
7SA642
7SA64  Protection + local control  detached control panel  mainly MV
All core functions are available in all the housing versions

6. SIPROTEC 4 Distance Protection, Scope of functions (1)
ANSI-No.
21, 21N 68 FL
Distance Protection
full scheme measurement with sophisticated loop selection
fast three phase and single phase tripping
with/without parallel line compensation
special filtering for CVT transients
special algorithm for detection and compensation of CT saturation  Low demand on CT specification
Power swing blocking/out-of-step tripping
Fault Locator with/without parallel line compensation
en513all7

7. SIPROTEC 4 Distance Protection, Scope of functions (2)
85-21
50N, 51N, 67N
85-67N WI
50, 51 50N-2, 51N-2
ANSI-No.
Universal teleprotection interface (PUTT, POTT, Blocking, Unblocking, DTT...)
High resistance earth fault protection for earthed systems
Teleprotection interface for earth fault protection (Directional comparison, Blocking, Unblocking)
Weak infeed protection (Echo and Trip)
Overcurrent protection DMTL/IDMTL as parallel or emergency function
en513all8

8. SIPROTEC 4 Distance Protection, Scope of functions (3)
ANSI-No.
59, 27 1)
50HS
50-STUB 79 25
50BF
49 2)
Voltage protection 1)
Fast tripping with switch-onto-fault condition (12 ms)
STUB Bus Overcurrent protection
Single and three pole multishot automatic reclosure
Synchro-check
Circuit-breaker failure protection
Thermal overload protection 2)
Earth fault detection in compensated/isolated systems 2)
1) 7SA522: Overvoltage, 7SA6: Over- and Undervoltage
2) available only in 7SA6

9. SIPROTEC 4 Distance Protection, Scope of functions (4)
ANSI-No.
74TC 86 FR 47
Trip Circuit Supervision
Lock Out
Oscillographic Fault Recording (total length 15 s)
Voltage Phase Sequence
Interfaces
Time synchronization (IRIG-B, DCF77)
User interface#1 (on the front for DIGSI 4)
User-(Service-)interface #2 (on the rear, DIGSI 4/Modem)
System interface (IEC /Profibus FMS/others)
Remote relay interfaces #1 (planned for teleprotection*)
1) Remote relay interfaces #2 (planned for teleprotection*)
1) available only in 7SA522
* available approx. 1st Q/01

10. SIPROTEC 4 Distance Protection, Monitoring
Operating system monitoring
Auxiliary voltage failure
Measured value detection
Buffer battery
Hardware–Watchdog
Software–Watchdog
Working memory
Program memory
Parameter memory
Sampling frequency
1/5 A–setting
Calibration data
Earth current transformer sensitive/normal
Modules (I/O Boards)
Plausibility monitoring
Current sum
Current symmetry
Open conductor
Fuse Failure
1- / 2-pole failures
3-pole failures
Voltage sum
Voltage symmetry
Voltage phase rotation !
new

12. SIPROTEC 4 Distance Protection
Quadrilateral Characteristic
5 Zones (time delayed) optionally:
- Forward - Reverse - Non-directional
Dependant Zone Z1b for Teleprotection and Auto-recloser
Prevention of load encroachment

13. SIPROTEC 4 Distance Protection: Overall Trip Time Curves at SIR = 30

14. SIPROTEC 4 Distance Protection, Data window position, Adaptive Measuring Algorithm

15. SIPROTEC 4 Distance Protection Function: Difference 7SA522 - 7SA6
for solid earthed systems
quadrilateral and/or MHO characteristic (MHO circle for specific markets, quadrilateral is preferred)
full market introduction: 1999
primary market outside continental Europe
7SA6
for systems with solid grounding or reactance (compensated) / isolated treatment of system starpoint
fault detection selectable as either I>, Z<, U/I and U/I/
Market introduction: Summer 2000
Primary market continental Europe

16. SIPROTEC 4 Distance Protection 7SA522
Mho Characteristic
5 Zones optionally:
- Forward - Reverse
Dependant Zone Z1b for Teleprotection and Auto-recloser
Prevention of load encroachment

17. SIPROTEC 4, Distance Protection Parallel-line compensation: connection and setting

18. Patented power swing detection provides secure operation with swing frequencies of up to 6 Hz
Example:
400 kV
400 km
fPS  2 Hz
3-pole fault

19. SIPROTEC 4 Distance Protection: Fault locator

20. SIPROTEC 4 Distance Protection: Phase segregated Teleprotection2 2
L2-E Z1
Z1B
L1-E 1 1 A B Z1
Z1B
A1 trips single-phase in L1 with a phase-segregated L1-receive-signal
Maximum of Selectivity
Note: 3 binary channels for both directions are requested or (in preparation) one serial link

21. SIPROTEC 4 Distance Protection: Teleprotection with three-terminal lines
Software provides teleprotection of three-terminal lines without additional logic

22. SIPROTEC 4 Distance Protection: High Resistance Earth Fault Protection
Earth (zero sequence) current protection, 4 stages
3 definite-time stages
1 inverse-time stage: IEC, logarithmic inverse or ANSI characteristic this stage can also be used as a 4th definite-time stage
Directional determination with 3V0 and/or Ipol of an earthed power transformer
Directional determination with V2 and I2 (negative sequence)
Sensitive 3I0-measurement with a dynamic from A to 100 x In
Elimination of higher harmonics with special digital filters
Inrush-stabilisation with I0/100Hz
Teleprotection: Directional comparison, Blocking or Unblocking
Operation with weak infeed trip and echo
Instantaneous trip after switch-onto-fault

23. SIPROTEC 4 Distance Protection: High Resistance Earth Fault Protection
Definite-time characteristic

24. SIPROTEC 4 Distance Protection: High Resistance Earth Fault Protection
Tripping characteristic Logarithmic Inverse t
T3I0pmax (P3145)
T3I0p (P3144)
3I0p(P3140)
Example: t = ln(3I0 / 3I0p)
T3I0min
(P3141)
3I0p Startpoint(P3154)
3I0 / 3I0p

25. SIPROTEC 4 Distance Protection: High Resistance Earth Fault Protection

26. SIPROTEC 4 Distance Protection: High Resistance Earth Fault Protection
Inverse-time characteristic: IEC

27. SIPROTEC 4 Distance Protection: High Resistance Earth Fault Protection
Filter characteristic for stages 3I0>>> and 3I0>>

28. SIPROTEC 4 Distance Protection: High Resistance Earth Fault Protection
Filter characteristic for stages 3I0> and Inverse time stage

29. SIPROTEC 4 Distance Protection: High Resistance Earth Fault Protection

30. SIPROTEC 4 Distance Protection: Permissive overreach transfer trip (POTT)TS

31. SIPROTEC 4 Distance Protection STUB protection for 11/2-circuit breaker arrangement
Release of STUB-stage with open line isolator:

32. SIPROTEC 4 Distance Protection: Auto-reclosure
Auto-reclosure (AR)
TRIP
1-pole
3-pole
RE-
CLOSE *
TRIP
RE-
CLOSE
final
TRIP ON
OFF
1st
dead time
2nd
dead time
T2-act
T1-act
tzone-delay *
ADT = Reclosure, when AR at the remote end was successful
DLC = Reclosure only on dead line
RDT = Reduced dead time, if trip had occurred with zone extension

33. Synchronism-check application examples functions
(separately settable for AR and
- combination with internal or manual closing)
external AR
- program selection via parameters:
- activation also for manual closing synchro-check / U1 > U2 < /
(settable) U1 < U2 > / U1 < U2 < / overrule
- asynchronous switching (settable) all programs separately settable
via binary inputs
- synchronous monitoring time, after which
the closing will be blocked (settable)
parameters measurement
- voltages U<, U>, U evaluation of the fundamental wave
- f synchronous switching ( Hz) - insensitive against harmonics
- f asynchronous switching ( Hz) for dead line check all three phases
are controlled
-  (1° °)
engersyn1

34. SIPROTEC 4 Distance Protection: Breaker failure protection
2 stages
Internal initiation and via binary inputs
Extremely short reset time: approx. 10ms
End-fault protection
Pole discrepancy supervision

35. SIPROTEC 4 Distance Protection
7SA522
with light
or electrical
exchangeable
upgradeable

37. SIPROTEC 4 - Distance Protection
Safe operation,
reduced training
requirements
User friendly Operation
Fits all applications
Flexible Functionality and
Open Communication
System concept
SIPROTEC and SICAM
One Family

38. Distance Protection 7SA522 What makes these devices so attractive ?
Log. IN 1
Log. IN 2
Log.IN3
Logic inputs from
the matrix to CFC
Logic outputs to the
configuration matrix F1 F2
>1
CFC
Log.OUT1
Full Logic Functionality
Additional logic
Interlocking
Measured values processing

39. Distance Protection 7SA522 What makes these devices so attractive ?
I1 :400.9A f:50.0Hz
U1:12.22kV
P :+8.03MW cos
Q :+2.64MVar
Comprehensive measured value processing
L A Max450.1A
L A Max421.2A
L A Max431.4A
E A
% IL UL-E UL-L L L L

40. Distance Protection 7SA522 What makes these devices so attractive ?
The easy handling with DIGSI 4